Best Low Cost PPM/PH Meter - BY together or Seperate?

Hey RIU's

Anyone got a suggestion for a PPM and or PH meter? Should I get them seprate or together?
Found these on ebay:

PPM
- http://cgi.ebay.com/3in1-Digital-PPM-EC-CF-Nutrient-Meter-Tester-Dipstick_W0QQitemZ250493683423QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a529646df&_trksid=p3286.c0.m14

PH - HANNA (some folks on RIU have reviewed good & bad
http://cgi.ebay.com/HANNA-HI-98108-pHep-pH-Tester-Meter-HI98108_W0QQitemZ250360301339QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a4aa3071b&_trksid=p3286.c0.m14#ht_820wt_1053

I'd go with a lower price Hannah than that, the one with the red or white top. We don't need precise pH readings just ranges. Here is an excellent ppm meter for a great price:
http://www.amazon.com/TDS-Temp-Combo-Waterproof-Meter/dp/B000VVVEUI/ref=sr_1_1?ie=UTF8&s=home-garden&qid=1254332045&sr=8-1

I got one of those tri-meters off ebay. I paid like $200 but it is really nice to be able to just glance over and see all the info I need about my rez.

I got a red top HANNA PH meter and a blue top HANNA PPM meter. I will report how they work once they arrive.