Gigabit Wireless Router recommendation

Hello all,

My current wireless router, a D-Link DGL-4300, is driving me a little nuts by frequently dropping out the wireless 'service'.
Its to the point where I'm looking to scrap it and investigate a new router with some advice from the experts here.
I have pretty good understanding of the technology, but it would take more time than I have right now to fully 'absorb' the
product line for the big players. The forum should have experience with a wider amout of product  

I've been fine with 802.11g, but would take the opportunity to go 'n'. A gigabit switch is a necessity. Well organized and
supported 'stock' firmware would be nice, but I would also like a router with Open source firmware (DD-WRT/Tomato/etc.)
support. If the stock firmware support trails off, I like having the open source community   Flash and RAM size large enough
to support a standard or greater DD-WRT binary would be a plus. A wireless 'Guest' VLAN would be a big plus.

I'm trying to keep the price below $125 (I got the 4300 for $80 in some crazy Cyber Monday sale a few years ago),
but realize deals like that don't always come along   I've looked at the Linksys E2000 and Netgear WNR3500L-100NAS so far.
The D-Link DGL-4500 was also looked at, but since my 4300 is having issues and was discontinued a year+ ago, it feels a little
aged. Let me know if there are any other feedback on these or other routers.

Thanks!!!

Jason