I know I'll get a world of stick go saying this (I did last time) but; there are really only two pistols to choose from for 10m Air Pistol, either the Steyr LP10, or the Morini 162e. The Steyr is so adjustable that anyone can get to grips with it, and the trigger on the Morini is the best in the world. These are the only two manafacturers from whom you can get a high level of service support via Harry Preston of Steyr, and Iqbal Ubhi of Morini.
Service support is essential especially if competing, I had pistol problems last year and Harry was on hand to sort them, as I result I came 2nd in the inter -regional pairs, and won A-Class in Wales (565!!), neither of these would have been possible if I had any other make of pistol as engineers of other makes aren't at matches.
There are lots of left-handed shooters shooting Steyrs and Morinis so I don't see this as an issue. My advice would be to get in touch with Harry and Iqbal and ask if you could try examples of their pistols, both have ranges at home and are known to be accomodating.
There are lots of other makes that are just as good but in the UK Steyr and Morini have the lions share of sales due to having UK agents and reliable after-sales care. When your spending the best part of a grand and a half such things are pretty important in my opinion.
Regards