Rules of thumb: DO NOT GO CHEAP ON PSU, you will regret it later on. Your system can live with a 450W or 520W OCZ Modstream, those have pretty good ratings and should be sufficient for your setup. Other recommendations:
Antec Neo Power 480W
Enermax Noisetaker 485W
OCZ Powerstrem 420W/520W
These are what I recommend as being decent PSU. As for the UPS, you can have that if you know there is a lot of power outages in your area.
Antec Neo Power 480W
Enermax Noisetaker 485W
OCZ Powerstrem 420W/520W
These are what I recommend as being decent PSU. As for the UPS, you can have that if you know there is a lot of power outages in your area.