What is the best SFF Low profile option?

[krooton]

So here I am, bummed at the lack of oomph that Kaveri brings to the table.

My scenario

A6-6400k
Gigabyte FM2A88X
4GB 1600 RAM
Low profile case
SDD
350w Be Quiet SFX PSU
1080p USB screen

My original plan was to bang the top level Kaveri in and sell my A6, giving me a capable little portable machine. But Kaveri isn't enough on it's own, so I am looking at my options.

1. Add a 7750 low profile to my existing machine and leave it at that (£80ish).

2. Add a 6670 low profile to my machine, and run it dual graphics mode with my A6 (£60ish).

3. Sell A6, get A8 7600, and run it dual graphics with a low profile R7 250 (unknown cost, probably around £100ish).

Which would give me the most powah?

 

[Nymins]

There is a 7850 low profile version, but it costs a bomb for what it is.

7750 is probably the best bet.

 

[krooton]

Indeed, that would be money better put towards one of the upcoming steamboxes that take a full sized graphics card sideways.