I flew for Pinnacle. The RJ200 was my first jet. I began with Sennheiser HMEC 25 ANR's. After a long day they feel like clamps on your head just like the DC's. Then I purchased the Plaintronics MS-200 for about $150. They're a single ear light weight set and I hardly noticed that I had it on. It'll go in either ear. The RJ is a quiet plane and the single earpiece lets you hear the other crewmember during conversation. You definitely don't need to spend $1,000 on a headset. Luggage, it's the LW 22" Stealth w/computer pocket. It fits in every overhead bin. You'll never have to buy another suitcase. You can order online or at a Stopover Store in MSP, DTW, or ATL. I also purchased the LuggageWorks Stealth Duffel (Model 202A) & LUGGAGEWORKS NORDIC COOLER for a complete package. The Stopover Store is really neat. You're airline should furnish you with a uniform including a winter overcoat/raincoat. Pinnacle had a big closet in Memphis with all different sizes and we tried stuff on to be sure on the sizes.
The guy who said to always be sure to ASK for permission from the CA to ride in the jumpseat was correct. Don't get frustrated with commuting. You'll get bumped off the JS by a mainline pilot at the last minute or out of the back by a retiree's grandchild going on spring break so just have a back up plan. But, sometimes, it goes perfectly and a nice gate agent or FA will invite you up to 1st class and all is right with the world. Be extremely nice to gate agents no matter what. I'm happy to provide any additional insight...just PM me.