Hello Dan--if you even think that you will continue to ride a bike--yes, it would be a good idea to get the upgraded model. If you aren't quite certain, perhaps not. Does it fit you properly? Have you checked out fit at a local bike shop? Mountain bikes are perfectly acceptable for commuting and trail riding, but the knobby tyres can make you slow on the road if you discover that you really like road cycling (the tyres can be changed out for slicks, though, making it a bit easier).
Welcome to BF!
East Hill
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TRY EMPATHY & HAVE LOVE IN YOUR HEART, PERHAPS I'LL SEE YOU ON THE ROAD...