High End Silent HTPC

[hassegubben]

Hi! I need some input to my winter HTPC project that will start in january. Actually my third project for MP. Can anybody comment on this hardware setup:
- Antec P182 (Black=no irritating reflexes, will host all my hdd's and act as a server for other computers, tower model=easy to reach the optical drive,good cooling with an option to replace the fans with more quiet ones)
- Corsair HX620 (silent, good for multiple hdd's and a high end CPU and GPU)
- Gigabyte GA-X38-DQ6 (cool components, built for amateur overclock, PCIe 2.0=better power management in idle=cooler GPU)
- Intel Q9450 2,66GHz (95W=silent air cooling possible, four cores needed for ORB, MP, IE etc), I intend to overclock to 3GHz(or more) for gaming purposes and best value for the money)
- Tuniq tower 120 (very silent with air pushed out through the top back mount fan in the chassis=push and pull flow)
- Corsair XMS2 PC8500 (matches the bus speed for the motherboard,right?)
- Powercolor HD 3870 passive (good for occasional gaming, silent GPU cooling, better contrast and colors than nvidia cards according to internet reviews, hdmi/HDCP/audio chip on board, P182 has an option to add a GPU cooling fan if needed )
- One silent hdd (500GB) for TV-recordings and applications=two partitions, one hdd (500 GB) or more for music, pictures, documents and movies)
- Hauppauge PVR USB 2 MCE (only thing I already own-works great)
- Hauppauge 500 MCE (allows me to record three analogue channels in total=no problem having multiple MP clients in other rooms with streaming TV-hope the new TV filter works OK)
- FloppyDTV with a pay card for viewing TV channels on a 42PV60E (actually a dual tuner/single pay card tuner is preferred, but does any exist with good quality? For COMHEM in Sweden.)
- BD/HD DVD optical reader/burner
- Microsoft Remote keyboard and remote control (remote for my wife, keyboard for administration purposes for me)
- A small screen as second monitor in the couch to view internet =TV listings-current implementation does not give a good overview. Today I run a laptop for this purpose. Even good for browsing the net during commercials.

Software part:
- XP professional eng SP3 (stable OS, not resource hungry as Vista, best for MP)
- ORB 2 for WEB programming of TV recordings and placeshifting of my pictures, music, TV and movies to the rest of the world (running that right now-recommended! Until MP will support the same features)
- MP 1.0 and TVE 1.0 with multiple clients in my home (I hope that v 1.0 will be ready this spring )
- Some nice games

I also hope that IPTV will be possible with MP. With all the above in place I will be happy for the next coming five years or so. Until MPII is mature.

What would you guys suggest to improve this setup?

[hassegubben]

My system:
case: Antec P182B
mb: ga-x48-dq6
memory: Corsair 4GB cl4
cpu: Q9450
cooler: Noctua NH-U12P
graphics: Sapphire HD 3870 ultimate
psu: Corsair HX620
dvd: Pioneer 215
hdd: Samsung spinpoint 500GB

What is a safe system temperature according to the BIOS? Mine reads 38C. CPU is 28C. Both in idle. I am worried because of the removal of the crazy cool heatsink and the refitting of the NB cooler.