With my Provari due to be arrving shortly, I am looking for some new attys to try other than my "old faithfuls"- the 510 and 306. I always heard the 901 gives much more flavor than the 510, so I want to try them out. I have found them from 1.5ohms up to 4.5ohms. I'm thinking somewhere in the middle would be best. Who sells the best ones with decent prices?