What Firmware in UK

I'm Lookin to buy a PSP in the next few days, but i would like either a 1.51/1.52 or 2.0 so i can downgrade to 1.5

But my problem is i am unsure as regards to the serials and psp-???? numbers as regards to the firmware, ive seen on the value pack PSP-1003k & giga pack PSP-1003g1 but i do not know what firmware this comes with and when ive asked in the shop i get a grunt and then a what?

Please do not reply with go to ebay get a 1.50 as i'd rather go to a shop get a brand new unit, not some scammer from Hong Kong.

so does anybody know what firmware is being shipped at the moment as ive read that gigapacks are version 2.0 and 2.01?? here in the UK

Thanks in Advance