I have been using TiteGroup for a while now and I like it, but I prefer Winchester 231. W231 has been hard to come by as of late though.
Forgot where, but I read somewhere that they are phasing out WW231 in favor of SuperTarget and SuperField. They are easier and cheaper to make.
When Hodgdon took over the distribution of Winchester powders it created this weird situation where the exact same powder is sold under two different labels. The difference is name only. You can verify this by going to http://www.hodgdonreloading.com/, click Pistol, then select 9mm Luger. At the right select HP38 and WW231, then Get Data. Every single load is identical between HP38 and WW231.HP38 IS 231. No need for Hogedon to sell the same powder under two different lables.