Any point in upgrading an Radeon HD3650 in a HTPC?

[Tinders]

Hey folks need some advice from those of you on the button with Pc systems, I'm horribly out of touch nowadays.

Anyway, im contemplating upgrading my PC a tad, its currently as follows :

AMD 64 X2 6000+ (with a Noctua Cooler)
4GB Ram (DDR2 800
Gigabyte GA 720 USR mobo
Asus EAH 3650 Silent gfx
430w be quiet passive PSU
Win 7

Ive got my hands on a used AMD Phenom X4 955BE, which im guessing is gonna give it a good bump up in performance. My next idea was to add another 4gb ram and update the graphics card.

My machine is basically a silent HTPC,Ive got a XBOX for gaming, so machine just needs to be able to pay blue rays and some minor video and image processing flawlessly which it isnt doing at the moment.

I was thinking of dropping a ATI Radeon HD 6450 into the machine,but just curious to what other options i have for a basic £60-£70 budget.

Also any ideas if another 4 gb ram will make much of a difference?

Any ideas greatfully recieved folks

 

[Cold_And_Miserable]

Search for "MadVR".

It's a free ultra-high quality, GPU-assisted, video renderer which works with media player home cinema. It's the reason why people are putting core i5's and hd5770's into their HTPC's.
It looks far better than using the standard video renderer.

edit: Any modern CPU should be able to handle Blu-Ray / H.264 /VC1 using a decent decoder. Upgrading the GPU will not help much since only proprietry decoders support ATi GPU acceleration in my experience. Even then the GPU-assisted decoders are very fussy and won't support many files.