Hi Lynn. A FET cycle is certainly a lot less demanding than a fresh. I woudl say it is definitely worth giving it a go even with one (al though I have to say I attempted a FET with 3 blasts and none of them made the thaw- but my RE tells me that is pretty unusual). What does your RE say about thaw rates and success rates with FET?
As for fresh, the way I see it you have no reason not to try again- as you say you stim well, had good fert rates, there's really no reason for it not to work except your age and surely then it's just a numbers game- keep going long enough ad you will get that lucky embryo.
I know nothing at all about male testing sorry- although I thought that's why ICSI was done- to identify the strongest sperm.
Are you considering other options at all (DE, adoption etc) or is it IVF or nothing?
Good luck with your decision.