I recently purchased a SW880 10" from NVT ($863 +$1 shipping) in Perth after being quoted $450 shipping for a GSO ex east. I had envisaged getting a 12" but also seeing that GSO were not available at the time (Bintel are GSOs) I decided to go for the SW 10" I was most impressed with the unit and saw a marked increase in efficiency over my homebrew 8"
Viewing the nebula in Orion and SMC (Tucanae) at a local club night under Perth's light ridden skies was quite impressive. I still wanted portability and the SW880 light bucket will fit in the boot of my car and the support on the back seat.
At the same time we also compared GSO SP EPs 25 & 10 with the SW EPs The Skywatcher EPs definitely had the edge especially in the peripheral vision. The focuser was a R&P and had a small amount of slop (See my message about this) I Later replaced it with a 2" Crayford 2 speed, which is excellent, from my older 8". A further test with an O2 filter on the EP brought the clarity up greatly. We also tried a regular 85A blue which also gave good improvement.
I received excellent service from NVT and their regular shipping prices are realistic enough to be outstanding. I find it hard to justify $450 (Bintel) or $250 (Andrews) when NVT can ship Oz Wide for $18 With similar or near Item cost prices.
The difference between 10" and 12" depends on how good your chiropractor is
