4 x 750ti OR 3 x R9 270 for setup

[camaroqqq]

I'm trying to decide between these two setups.  I can either go with 4 750ti.  I have 1 now that gets about 300kh/s and i think I could get it up a bit with a powered version.  

I don't have a 270 but hear they get around 400kh/s

270s are $250, and 750ti are $150.  Plus I would need to spend a little more on a PSU for the 270 setup.

obviously the 270 setup is more expandable without having to build another rig and with the right PSU

Whatcha think?

Edit: i forgot to mention these are just about the best setups i could afford right now

[9800GTX]

forget about 750ti

R9 270 can reach up to 450K,as twice as 750ti's capacity

[Equate]

R9 270

[xbudahx]

My Gigabyte R9 270s run 480 khash/sec rock solid.

[igroock]

My Gigabyte R9 270s run 480 khash/sec rock solid.

Which brand?

[camaroqqq]

Hhmm seems like overwhelmingly, the 270 is more popular.  Have you guys seen the new version of cudaminer, puts out 300-320mh/s, but hhmm you think 480 for the 270?

Would 3 of these running plugged into mobo be a heat issue?  Kind of need it stealthy (size wise, not really noise), so just gonna use a gaming case filled with fans.

I got this mobo, http://www.newegg.com/Product/Product.aspx?Item=N82E16813128594

and already have a 1500w PSU (http://www.newegg.com/Product/Product.aspx?Item=N82E16817256054)

My original plan WAS to go with 270 or 280, then I heard about what the 750ti could now do, so I started re-thinking.

[Tons0fun]

If you are going to stick them all in a standard case and you are worried about size you may want to consider the 750Ti's simply for the heat factor. Also 1500w is way, way overkill for a 3 card rig regardless of which you go with. You could get away with a 600w with the 750s and 850w with the 270s.

[camaroqqq]

Ya lol, bought the psu first, was gonna go quad 280x, but had to slam the breaks a little bit.  Maybe I'll sell the psu, and get a smaller and go 750ti... i dunno ugh...

[camaroqqq]

Does it matter if you mix and match brands, or would you go all the same brand?