several years ago i was given a craftsman buffer/polisher as an xmas gift and have never used it, it has a 10" surface. i have never used a machine before but would like to start. i was wondering if the craftsman machine would give me the same results as a porter cable 7424 (not sure of the model but costs like 130)? if the porter cable would yield much better results, ill just buy one but i would rather not have to spend money to buy a machine which would give me the same results as the one that i have. if it is recommended that i go the porter cable route, what will i need to go with it? finally, where can i find the best prices?