If you know how to installing your vps (apache, mysql, php,, etc) just stick with veportal, veportal itself just control panel for vps itself (eq, rebooting, change hostname, and reinstall OS).
I prefer debian as server, because they really fast on updating new package. if your memory more than 1 GB, then choose 64 bit version because it ate more ram, and run faster than 32 bit.