I have started to push 140 miles apart from last week which i was ill thought best not to go out.
You are right i don't need to add the complexity of the numbers from a powermeter
Look
@jamma, by all means spend your money on what you want, I was like you a couple of years ago, just starting out, had basic kit, thought "this and that" would "make" me faster. It is true, some things - like lighter more aero wheels will make you faster, but only in tiny amounts and even then for aero stuff to work properly you probably need to be pushing well over 20 mph. At your level you really won't need it, you just need to build your strength, stamina and skill, and that takes time.
A really good rider will go fast on any old nail,
A crap rider will be slow on a really expensive bike, it's the motor, you, that really makes the difference.