worth upgrading??

hello.

i've an old shuttle sn95g5 v2 at the moment, running an old s939 AMD athlon 64 3000+ on a gig of ram, Asus Geforce 6200 128MB with vista. the box itself will take any of the cpus listed below - its pretty easy to get one of hte non-x2 4 gig chips for around £30ish, and a 2 gig matched pair of rammerys for £30 or so.

Athlon 64 AMD Athlon 64 Socket 939 3000+ SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 3200+ SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 3500+ SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 3700+ SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 3800+ SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 4000+ SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 FX51 SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 FX53 SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 FX55 SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 FX57 SN95S2XD
Athlon 64 AMD Athlon 64 Socket 939 FX60 SN95S2XD
Athlon 64 X2 AMD Athlon 64 X2 Socket 939 3800+ SN95S2XD
Athlon 64 X2 AMD Athlon 64 X2 Socket 939 4200+ SN95S2XD
Athlon 64 X2 AMD Athlon 64 X2 Socket 939 4400+ SN95S2XD
Athlon 64 X2 AMD Athlon 64 X2 Socket 939 4600+ SN95S2XD
Athlon 64 X2 AMD Athlon 64 X2 Socket 939 4800+ SN95S2XD
Opteron AMD Opteron 165 Socket 939 1.8GHz * SN95S2XD
Opteron AMD Opteron 170 Socket 939 2.0GHz * SN95S2XD
Sempron AMD Sempron Socket 939 3000+ SN95S2XD
Sempron AMD Sempron Socket 939 3200+ SN95S2XD
Sempron AMD Sempron Socket 939 3400+ SN95S2XD

i use the system for a mix of photography stuff, watching videos (its hooked up to an lcd telly in my bedroom) and general web browsing. Question is - is it worth upgrading any of those components? I'd like to keep it quiet - so any gpus with big fans are out of the running. or should i just wait another year or so and buy something completely new?

H