I too have very simple needs. I prefer a belt clip case, but not the OEM leather pouch with the magnet. I have been using
this type since my Treo days (actually back to the StarTac days) and I find it still fits my needs. I lose the In-Holster setting features, but I prefer the access this kind of clip gives me.
Car charger in each car, Plantronics Discovery 640 BT headset and I think I have a stereo headset somewhere...
Of course, a couple of MicroSD cards are mandatory, one 2GB and a 4GB (both SanDisk) and an adapter to fit the PC card reader. I also bought an Invisible Skin, but I never did get around to installing it. Any day now...