I've been through the whole DE phase, to be honest unless you have really quick growth, you will find a Mach 3 is a lot less time consuming and that you really dont need a DE razor.
if however you do have time and do like to feel as if youre still 10 years old and never grown a hair on your chin in your life, you may as well go the whole way and invest in a good DE razor (i got a merkur from mankind.co.uk which has adjustable blade levels depending on how much stuble you have) some GOOD razor blades (i recommend feathers, but beware these japanese ones are SHARP) some good shaving soap or cream, a good brush and a shaving bowl. This can cost up to £500 depending on good you want the products, but in the long run it will save you money.
I've went back to the Mach 3 now because i got bored of the whole lathering process and I didnt have that much stuble anyway
- i could spend 10-15 minutes shaving with my DE, but less than 3 minutes with the mach