Own and use all VSX series as well as a recent VR200 that I use primarily for beach/surf fishing on a 13ft rod. VR does not feel as bomb proof as the VS but it still is a great reel and so far as held up well (but only one season hard use).
For a 7ft rod, the VS100 would probably match a 7ft rod better than the VS150 although if I could only have one reel it would be the VS150 as its a bit of an all rounder.
The equivalent sized VR to the VS100 would be a good choice but you may regret not spending a bit more for the VSX version.
Some good used VS deals can still be found.
Best of luck.