teigyr: As for the beeping, well, I haven't run with the HRM yet, in this new mode that beeps, so we'll see. But I think I may be ok with running at the slower pace, on longer runs. But if that thing beeps when I get up to 145... Oy. It's hard enough to stay as low as 150!
Since my 5k a few weeks ago I haven't decided what my new goal is, but I think it's going to be another 5k in 3 weeks, then one in September-the focus for both being to improve from my time of 26:05. I'm putting together a training plan that'll have me doing a variety of run lengths each week; for the shorter ones (certainly for any sprints/intervals) I'll plan to run a faster pace.
Wahine: thanks for the suggestions/advice! I still have a few calibrations to make on that HRM (i.e. my "ownzone" and taking its fitness test), so that may help me sort out my own training HR zones.