It will not be fair on me to suggest your swtiching, as involvment of funds on your part is involved. However i could understand from the following thread:
http://forums.devshed.com/archive/t-211423 that security is the issue. Presently the GC board does not have much of commercial activity. Therefore unless you plan to have those, moving to VB is a decision you have to base on your financial outlays.