Lovely Sherman there bro!
Just to add to the PE discussion.
Photo Etch (metal etched parts for super detailing) is rarely a whole kit...more likely add ons for a kit. Sometimes you'll get a fret of brass with a kit, or you'll buy from a separate manufacturer. It can just be a few cockpit upgrades, some seat belts...or a huge revision to the kit itself.
The trick with it is that you can create much finer detail, which is then much more 'in scale' on the finished model. It's helpful to have some specialist tools for accurate folding of the sometimes very tiny parts.
There is a whole world of manufacturers, both big and small, making After Market (AM) parts in PE, also in Resin. Also you'll find pre-cut masks for canopy or camo styles (great if you are doing WW2 German aircraft!)...the list is endless and if you are not careful you can easily spend as much as you did on the model by adding extras.
The comment about airbrushes (Fubar) I agree with. Don't waste your money on cheap ones.
H&S are my preferred brand...German precision engineering, very modular between types, very easy to deconstruct and clean, full range of parts available.
I get mine from Paul at Little Cars.
http://www.little-cars.co.uk/
H&S
http://www.germanairbrush.com/
I am a member of a great UK based site, Flory Models, more angled to aircraft modelling, but everyone does a bit of everything. It's a paid site (35 UK pds a year I think) but I find it's great, pretty damn cheap really, and the fee keeps most of the idiots away :-)
The main guy is super helpful and there are untold hours of HD video tutorials and squillions of pics and 'how tos' and members builds and a massive forum with answers to all your modelling questions, WIP threads etc.
There is often a SIG / GB (group builds, special interest builds) on the go...just finished a wee MiG 15 for Russian Jets Through the Ages and am into a F14 Tomcat for a F14 group build at the moment.
Anyway, it's here..parts of the site are free...
http://www.florymodels.co.uk/
It's a great hobby for me. Not too expensive, I can do it when I have the free time, it's a creative outlet and oftne quite a challenge. I learn heaps about the subjets I am modelling and doing this hobby now in the Internet era is just amazing...the amount of product, info, help, pics, video, reference material, forums, sites etc is just staggering and just a internet connection away.
Bloody Hurrah!