for $700 you can build yourself with a gaming-cum-HTPC
Parts i have selected-
A Sony 24x DVD burner-$19
Asus P8P67 LE B3 mobo supports Xfire-$130
Intel Core i3 3.10 2100 sandy Bridge-$125
a super SB cpu with great power that can handle any HD content without any Problem
you can also upgrade to 2500k or 2600k(thats unnecessary)
for storage a samsung F3 1 tb is the best choice for speed and money-$60
Corsair Force series SATA III 64 gb SSd will take care of your OS and Important softwares with blazing speeds-$115
Coolermaster extreme power plus 500w psu is just more than enough for anything you need-$45
NXZT M59 is the best case for money,sexy looks and HAF(high air flow)with 5 120mm and 2 140mm fans
Graphic=XFX Radeon hd 6770 is the replacement for previous 5770.it comes with 1gb GDDR5 and is able to handle most of the games
with high deatils.a friend of mine plays crysis,crysis warhead,crysis 2 and fifa 11 maxed out at 1600*900 with 30+ fps in every situation.
an aftermarket is not recomended bcoz you dont overclock
sorry i made it a bit more like gaming rig but trust me you will enjoy it.you can watch your 1080p movies and also play your games.
i suggest you to wait for a few weeks blu rays will cost less.
-Pentium Sandy Bridge, thast more thatn the power you need to wtch 1080p blu-ray.
-4GB RAM, its cheap and any brand is fine
-H67 motherboard. Any brand is fine too, and the HDMI is excellent quality. Get a micro-atx form factor
-SSD is out of your budget
-Take a look at silverstone cases
-Coller Master Silent Pro 600W $100. Dont safe here, you only need to buy a psu once and its yours for life.
-LG Blu-ray burner. Its only a few more bucks from DVD burners, its tottally worth it!