Hello there.
Firstly, I would advise that you change your username to something other than your email address. Spambots love to harvest information like this and you may well receive emails trying to sell you holiday insurance.
As for which Mac to buy, I'll be slightly biased and say that the size of your wallet dictates the size of your Mac
But, seriously, the main thing to think about is portability. MacBook Pros are great machines, but you are paying a premium for a mobile device. If you never intend on taking it out of the house then a desktop is better. Then the question of peripherals. If you already have a good monitor, mouse, keyboard etc then a MacMini can give good bang for buck. But an iMac is a beautiful piece of design and can be much more powerful than the Mini.
At the moment, Apple are in a transition phase, moving away from Intel processors into their own chip technology, similar in design to the one in your iPad. This new type of processor is a System in a Package (SiP) which means that the CPU, GPU and RAM are all integrated onto the same chip and can work faster. They have refreshed some of the basic models already and early signs show them to be really good machines. However, they are still to release their middle to top range stuff and some software and hardware manufacturers are still adapting their products to run on the new machines, so it might be wise to hold fire for at least a couple of months before buying, to see how it pans out.
That said, there have been some great reviews for the base model MBPs and MacMini, so if you don't intend on running limitless audio, MIDI instrument and effects then of those might fit the bill already.
Hope that helps.