Need help deciding on a PC

Ok so I have looked on this site for a few months now and will be ready to purchase a new PC soon.  I'm currently on a old Dell 4600 pentium 4.  So of course anything I choose will be a major upgrade.  I mainly just play WoW, but also have Cod4 and would like to play the new modern warfare 2 when it releases. Heard a lot of good things about DS and many bad things about ibuy and cyberpower.  DS was an easy choice for me.

I was looking over the i5 value 2....i5 enthusiast 1....and the i7 extreme 1 prebuilts.
I don't see me spending over $1500 but those seem nice enough for me.

So which prebuilt do you recommend?  I would like 64 bit vista so it gives me the option to buy more memory but I could not tell which those prebuilts come with.

Another question. If i buy one of those prebuilts, can I use this Dell monitor?  I don't know the specs for it, but its a 17 or 19in LCD.  currently play wow at 1280x1024. will that go higher with new video card? or would i need new monitor?

Been so long since I bought a PC, so sorry for all the questions.  Any help is appreciated thank you.

Your monitor has a max res of 1600 x 1200 or lower, for that you will need only one gpu.

now if you get a bigger monitor down the road then you will need 2 gpus so that you can play games at high settings and at 1900 x 1200.

wow does not use sli, so you will not benefit from sli with that game, however cod4 does support sli and if you ever get a bigger monitor you will need dual sli for that game and other games that support it.

most of the prebuils come with vista 64bit, cause 32bit can't use 6GB of ram, so where you see 6GB of ram, that system has a 64-bit os.

so how does the next 3 years look for you? do you think you will need to upgrade your monitor?

do you need a sound card or a wireless card?

Edited by DST4ME - 18 Sep 2009 at 6:09pm

thank you for ur replies.

Ya i did view the specs on the prebuilts, maybe it was just one but I did not see where it showed 32 or 64 bit.

and dst, honestly I'm not sure what i will be playing in 3 yrs but yeah I'm sure if I get a nice PC and start playing newer games I would have no prob buying a new monitor.  next game i buy will be the new modern warfare game in november.

and i see you asked about sound and wireless card.  atm i just use a usb wireless adapter which connects to the router in the living room.  And I have a sound card in this old dell.  I figured i would use onboard sound or just buy a new one later. 

Since i don't see me spending over 1500, the prebuilts looked like the best deals for me.  and one video card should be good enough for now, maybe with a possibility to do SLI down the road.

Ya I use my wireless adapter to connect 24/7.  I usually have no problems with it, however it does disconnect from time to time. To fix it I just unplug the usb and plug it back in and it works again.  Not sure why it does it.  But ya it rarely does.

Most likely I will keep this monitor I have at first so one 275 will be fine.

Another question, If I decided on the I5 enthusiast 1 build, I see it comes with free liquid cooling.  Is that a pretty safe deal?  I had a friend who used liquid cooling once, although he did install it himself and it was when they first came out, after awhile it leaked on his gpu and ruined it.  I think that's all it hurt.  Just kinda scares me to have liquid inside the PC.

thanks again for more help.