I would say get a road bike. Decent quality imo starts at about $1000 unless you find a good used one. I don't buy used but that is just me.
You don't mention your weight so if you go for a $1k bike and are real heavy, I'd guess you may be buying a new rear wheel after 2,000 miles or so. Some can take a year to get 2000 miles, others 3 or 4 months, depends on your style.
I say road bike as that is what every rider on our rides is riding. Not man can show up on a mountain bike and keep up unless they are a really good fast rider. So a newer rider will show up on a road bike and probably struggle to keep up whereas if he showed up on a mountain bike, no way. So unless you want to ride alone all the time on the road, and are looking for a little speed, get a road bike. Not saying these people are riding race pace speeds but it makes it easier to keep up vs other style bike trying to keep a road bike pace.
Even a more relaxed geometry road bike is a good deal when it comes to keeping up. Some geometries are a little less aggressive and some are really aggressive. I've seen less aggressive geos keep up with very aggressive geos all the time. So a road bike is nice but one does not need the sharp race angles to keep up with this type of a group, unless you plan to race somewhere down the road.
FTR, my skinny weight is 230 at 6'1. I thrashed plenty of stock wheels so I started building my own that has worked well for me. Inexpensive, free labor, and much better quality than someone who is just slapping together parts at a shop to make a buck. I follow all building tips I could find and get a great wheel that lasts 20,000+ miles for about $150, parts purchased on the net, good deals.
Now at 260 pounds, I'm far from the average cyclist weight so I stick with my 30 mm deep, 32 spoke wheels and have fantastic mileage on them vs the low spoke count light weight wheels skinny guys keep trying to push on me.
So I use Velocity Deep V rims and do fine being a recreational rider.
So depending on you size and weight, if you're a big heavy guy like me, you may want to invest in a strong rear wheel.
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32 spoke Deep V, 30mm deep. I'd rather ride a heavy wheel vs buying new wheels every year. I build my own so I know it's quality at its finest!
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