I've done a handful of reading on this subject and I finally narrowed it down to two PH Meters that I'm looking at purchasing. I don't want to have to purchase twice, so I'd like to hear recommendations and personal experiences. I'm looking at the Oakton EcoTester PH 2 and the Bluelab BLU2210 PH Pen. Is one brand better than another? Is it worth the extra change for the Bluelab pen? Keep in mind that a budget is always nice to stick to, but I'm willing to spend a little more where it's actually needed. Also, is it really worth buying a cleaning kit? Or can I just purchase calibration solution and rinse it out in the sink?