Mustang fever
Mustangs are a great fun car that can be driven everyday. So far you've gotten some real good advice. In today's world and technology the toughest decision is that there may be too much choice. One nice thing is that you can always start off with the lower price range ( ie. older car) and work yourself up. There are a lot of weekend drivers out there and some good buys. Use the background check services that are out there. This will save you a lot of hassles later on.
I currently own a 1996 pacific green,GT convertible, 5 spd, 4.6 SOHC. I bought it for $12,000 in 2002, It had 56k on it and I currently have 62k . Probably spent about $3k on it with add ons. Including a new top, set of custom wheels, "bullit suspension" ( lower stance and better handling) plus some mechanical upgrades. Love the car
I have had mustangs on and off since I was 17-(1967 mustang convertible)
They are probably one of the best car to cistomize to suit your taste based on the volume of cars produced, and availability of aftermarket parts. Plus with information on the internet like this forum and other websites help is a click away.