Which motherboard for Q6600 4850 4GB £550/$1100 system?

Edit: Ordered! (With time to edit though). Thanks for all your help guys. =)

I was determined not to post, but I've given up! So much has changed in the ...7 years since I made a desktop.

Looking for a motherboard to go with this system.
Have a £50-£110/$100-$220 budget left.
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Intel Quad Core Q6600 95Watt G0 Stepping £126.90 $253.8
Edit for future readers: UK buyers can get this cheaper on Overclockers

Corsair Twin2X 4GB DDR2 (2x2048MB) XMS2 Dominator 8500C5 5-5-5-15 £83.42 $167

Sapphrie HD 4850 512MB £128 $256 (heh, memory/price in £/price in $ all consecutive powers of 2)
Edit for future readers: UK buyers can get a cheaper 4850 on Overclockers (Gainward edition)

Arctic Cooling Freezer 7 Pro Socket 775 CPU Cooler £18.57 $37
ThermalTake Soprano Black Middle Tower Case £47 $94
Antec P182 Super Midi Tower Case £87.54 - Well worth the upgrade according to reviews. Worked with the case before also. Plus should last me a good 10 years unless there's some radical motherboard form factor change or something.

ThermalTake Toughpower 700W PSU £72.26 $144
Thermaltake W0103 Toughpower 600Watt ATX Power Supply £60 $120 (sufficient)

Edit: Chosen mobo;
Asus P5Q Pro - P45- £80.41 $161

Total: £584.77 / $1,168.78
Bit more than planned, but budget is quite flexible. (Especially if someone gets round to buying my MSDN subscription on eBay )
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I don't really plan on upgrading for 4 years, nor am I going to wait for Nehalem. I play a lot of games, and don't expect to be able to play the top end games 2 years from now in anything other than medium-low settings.

Edit:
If I do upgrade graphics it would be a while from now; so I am aiming for a cheap non-crossfire supporting P35/P45 mobo intending to replace the gcard later, rather than go with a more expensive X48 and upgrade later by adding another card.

Based on using a P35 or P45 chipset, I've narrowed my vendor's motherboard list to these candidates. (x48 boards too expensive when not using Crossfire)
--The list--
Asus P5Q Deluxe - P45 - £129.25 $260
DFI LANPARTY DK X38-T2R £123 $246
Asus P5Q-E - P45 - £108.90 $218
Asus P5K Premium - P35 - £107.35 $215
Asus P5Q - P45 - £97.53 $195
Asus P5K-E - P35 - £94.85 $188
DFI LANPARTY DK - P35-T2RS£87 $174
Asus P5KC - P35 - £86 $172 - Only one to support DDR3 also
Asus P5K Pro - P35 - £81 $162
Asus P5Q Pro - P45- £80.41 $161 - Chosen. Best out of all really.
Asus P5K - P35 - £72.79 $145

Twin x16 are not viable at my resolutions. Thanks shadowduck for that tip!

I already have an old SATA & 2 IDE hard drives as well as a dvd+-rw and don't plan on replacing them.

Thanks _so much_ in advance for any advice. I'm in way over my head.

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For the benefit of others:
http://www.novatech.co.uk/novatech [...] Q6600E#top - CPU
http://www.novatech.co.uk/novatech [...] REEZ7P#top - Fan
http://www.novatech.co.uk/novatech [...] P-4850#top - Graphics
http://www.novatech.co.uk/novatech [...] HX8542#top - Ram
http://www.novatech.co.uk/novatech [...] T-SOPB#top - Case
http://www.novatech.co.uk/novatech [...] -W0106#top - PSU

Thanks for your reply shadowduck.
I am likely running under that res for the foreseeable future, so plan to use a single card at the moment and later either upgrade the card or add a second.

Narrowed list of boards down to just those that support DDR2, use P45/P35 and have onboard audio. Wrote the full list up so it's easier for people to point out ones to avoid/recommend.

I'm still confused about chipsets. Read loads of articles (most more than once :\) and still can't find a clear winner between p35/p45 given the cost differences. THG says P35 has faster usb/sata throughput and is better if building a new system, other comparisons say p45 "wipes the floor" with p35. Most bonuses apply to crossfire which I may not ever use. (I'm assuming by the time I upgrade ~2 years from now it's probably more viable just to replace the 4850. Still want opinions on that assumption though).

Thanks again all.

Excellent. Thanks again.

I think I'm going to go with the Asus P5Q Pro;
http://www.novatech.co.uk/novatech [...] U-P5QP#top
Interestingly, it's priced $30 cheaper than the "Asus P5Q" (no pro). Only down side compared to all the others (up to £120!) is a lack of eSata port (back connector provided and 6 onboard sata+2 drive expert), no dddr3 support (doubt it will be worth it), and no optical (which I never use anyway).

Think I'll use extra cash on getting a better case.

yes P5Q-pro, but skip the Reapers, they are having some problems on P5Qs. Check with Crucial, I think they have the most success on those boards.