I have been roasting about one year and loving it! I too started with a Newcomer and learned the basics with it. As you know it's and I really couldn't hear the cracks, used the Newcomer guide (x mins for city, etc) but really ended up just roasting by color. IMHO, the is fine as a starter roaster but is very limited. The smoke suppression is great and I was able to roast inside. I recently moved up to a Belmont 1600 2 and freaking love it. I do have to roast on the back porch but that's small price to pay given the affordable price ($380ish) and the added flexibility. I usually roast about 8 Oz's and learned I need to set the amount on the roaster on 1lb. And I can hear the cracks great, even 2 c. I would recommend it and foresee moving up to the next level with a + 1000 buck roaster. I was using several green bean supplies and all were great, the thing that happened was I have made friends with a local pro roaster who will sell me green beans, I pay him $6/lb; I can beat that online, but given his selection and quality, plus no shipping cost it's a great deal. Plus I get to hang around his roasterly and talk coffee and roasting with a real pro. Any time I want to try something he will give me a 1/2 # sample, it is kickass and I will get a few lbs. I have a son in Tampa we go down to see 3-4 a year, I found a supplier down I stop in and buy from. He has great prices and no shipping. I don't think his quality is quite as good. Can,'t think of the name now but it's a long Italian name starting with a C. They sell online. Just Google green coffee Tampa FL and you will fine them. I recommend them as well.
Good luck.
D