It also depends on how you see your flying developing. Microlights are great fun and mostly very affordable, as is getting the NPPL licence. Adding a SSEA rating to an NPPL is fairly easy and then allows you to fly pretty much all normal GA types with some restrictions.
You might want to take a look at the performance of some of the hotship microlights before you eventually take the plunge and consider a JAR PPL. The fastest UK legal microlight now does 145kts and many cruise at speeds around the 90 to 100kt mark. These are serious going places machines, with capabilities exceeding some older GA types. UK microlight pilots frequently tour Europe, as many countries accept our NPPL with a microlight rating in the same way they did the old PPL (Microlights).