Yes, it sound like you want a hardtail. Since you came to MTB from BMX, like me, I'm guessing you want something that's like a BMX bike, only bigger. As far as brands, NS, Transition and Black Market are really good, but also very expensive. If you have the budget, get one of those. Otherwise, look at Norco or KHS. Also, you may want to try and find a lightly used bike for sale near you. I did this and found a $1500 bike that I payed $400 for. And in regards to the gyro, don't use one, simply because it's for hydraulic brakes. Hydraulic brakes are a pain in the ass to bleed. Just get mechanical disk brakes. They're more reliable, and cheaper too.