Considering an upgrade and have come up with the following. I don't really want to spend much more than £500 and the components I've listed seem to offer the best value for money from the research I have done.
Please could you critique my proposed build if you can see anything that might be a better option:

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Also, I have a fairly old PSU and while I think it has enough grunt, I don't know if the standards for the connectors has changed since I got it. It's a Corsair HX620 and has the following:
- Molex: 10 Connectors (modular)
o 2x 31” (3 connectors)
o 2x 18” (2 connector)
- SATA: 8 Connectors (modular)
o 2x 32” length (3 connectors each)
o 1x 26” length (2 connectors each)
- PCI-E 6+2 Pin: 2 Connectors (modular)
o 2x 22” length
- 4-Pin Floppy: 1 Connector
o 1x 6” length (dedicated cable can be attached to Molex connectors)
- 20+4 ATX Connector: 21” length
- 4+4 Pin CPU connector: 21” length
- Dedicated fan connector: 6” length (2 fan connectors)
And finally, will this fit into an oldish case (Lian Li PC-7+).
For both these two aged components (PSU and Case) if you don't think they'd be suitable then is there anything else you would suggest? Antec 100 seems like a reasonable cheap case, not so sure about the PSU?
Thanks.
Please could you critique my proposed build if you can see anything that might be a better option:

Uploaded with ImageShack.us
Also, I have a fairly old PSU and while I think it has enough grunt, I don't know if the standards for the connectors has changed since I got it. It's a Corsair HX620 and has the following:
- Molex: 10 Connectors (modular)
o 2x 31” (3 connectors)
o 2x 18” (2 connector)
- SATA: 8 Connectors (modular)
o 2x 32” length (3 connectors each)
o 1x 26” length (2 connectors each)
- PCI-E 6+2 Pin: 2 Connectors (modular)
o 2x 22” length
- 4-Pin Floppy: 1 Connector
o 1x 6” length (dedicated cable can be attached to Molex connectors)
- 20+4 ATX Connector: 21” length
- 4+4 Pin CPU connector: 21” length
- Dedicated fan connector: 6” length (2 fan connectors)
And finally, will this fit into an oldish case (Lian Li PC-7+).
For both these two aged components (PSU and Case) if you don't think they'd be suitable then is there anything else you would suggest? Antec 100 seems like a reasonable cheap case, not so sure about the PSU?
Thanks.