alphaone said:
will I be able to log PIC time with my CFII and all doing the XC's?
Yes. Now that you have your private license, it doesn't matter if you're receiving instruction or not, you still log the flight as PIC (assuming it's in a single-engine land airplane).
alphaone said:
Should I keep buying XC time now or save my money?
It could go either way. On one hand, you can probably stop flying XCs on your own, fly some with your CFII, and you'll get your instrument ticket right at the minimum number of hours.
On the other hand, you're probably going to need to buy some time to reach 250 hours for your commercial license, so it's not like buying time is throwing money away. It's just a matter of buying it now or later. Even if you overestimate how much you'll need and fly past the 250 hour mark for your commercial, having extra cross country time will put you that much closer to the 500 hours needed for a Part 135 job.
Even more important than all that, I'm a huge believer in people flying a lot of solo cross countries early in their flight training. It builds knowledge, confidence, and proficiency like you wouldn't believe. I feel that dropping the extra money for those extra solo cross country hours will more than pay for itself in the increased proficiency you'll get as a pilot.
So here's my advice--if you're only going to fly back and forth over a boring, unchallenging, familiar, 51-mile-long route, just for the sake of racking up hours, you should save your money and start into your instrument training.
If you keep expanding your horizons, pushing your own comfort zone a little, like flying long distances, flying into busy airspace, flying into short strips, flying at night, whatever it is, always trying to experience as much as you can, then it's money well spent. Even if it's just taking friends along with you on XCs, learning how to keep pax safe and comfortable, it's money well spent.