Do I splurge my miles for a once in a lifetime trip?

Hi all. Long time lurker though I seldom post
I should see to sorting that really...
I am a 25yo PhD student who has been awarded a three month fellowship in NYC. I am very excited although the financial logistics are painful as the award was only $4000 and accommodation alone is exceeding that. Nevertheless, over the years I have slowly built up my VA miles to finally reach 100k. I know I know, compared to most of you that is nothing, but I've only ever flown economy and so it has taken me a long while to get here.
Now, I have decided to use my FC miles on this trip as it seems like the perfect opportunity to just go for it. However, I am reluctant to spend them all because the took so long to earn. Ridiculous really. I am seeking your opinions, although I know ultimately there is no right or wrong answer.
My plan is to fly to NYC towards the end of March, and return on a flight from Seattle mid-June. I can book both ways in UC for 90k miles and £563. However, part of me keeps saying that I could fly PE on the outbound leg instead (still UC inbound) and it would cost around £600 and 75k miles.
Now, V-Flyers. I am asking you tonight for your honest opinions. Should I just stop being so worried and live a little and go UC both ways? I've never experienced this and will be flying alone. Alternatively, is the NYC flight too short to make the most of UC and therefore better to be enjoyed in PE?
Thanks in advance for you help and I hope you've all had a fabulous weekend!

I am a 25yo PhD student who has been awarded a three month fellowship in NYC. I am very excited although the financial logistics are painful as the award was only $4000 and accommodation alone is exceeding that. Nevertheless, over the years I have slowly built up my VA miles to finally reach 100k. I know I know, compared to most of you that is nothing, but I've only ever flown economy and so it has taken me a long while to get here.
Now, I have decided to use my FC miles on this trip as it seems like the perfect opportunity to just go for it. However, I am reluctant to spend them all because the took so long to earn. Ridiculous really. I am seeking your opinions, although I know ultimately there is no right or wrong answer.
My plan is to fly to NYC towards the end of March, and return on a flight from Seattle mid-June. I can book both ways in UC for 90k miles and £563. However, part of me keeps saying that I could fly PE on the outbound leg instead (still UC inbound) and it would cost around £600 and 75k miles.
Now, V-Flyers. I am asking you tonight for your honest opinions. Should I just stop being so worried and live a little and go UC both ways? I've never experienced this and will be flying alone. Alternatively, is the NYC flight too short to make the most of UC and therefore better to be enjoyed in PE?
Thanks in advance for you help and I hope you've all had a fabulous weekend!