new simracing setup advice

Hello simracers
I've been racing with a wheel for 1.5 year and for about 4 months on my PC, into the proper sims like GSC. I use a G27 atm with a wheelstand pro for a DFGT (the wheel I originally had) modified to fit the shifter. here's the foto:
https://www.dropbox.com/sc/71j6x6zvjgwqtb5/zWNWjIBTuX
I'm looking to upgrade my wheel again, and possibly a racing seat with a monitor. I'm using a laptop now so I don't know how that'll work if I want to use a monitor. I'm looking to spend about €500,- for the setup, and use the money that I get from the G27+wheelstand when I sell it. I hope it'll be around €700-€750 in total.
What do you guys recommend? buy a used setup or brand new? and what kind of wheel is best (I'm only doing PC racing). I was thinking about a fanatec Clubsport wheel base with a BMW wheel. 
Any advice will be greatly appreciated 

fanatec clubsport are really nice but expensive but then u need some more money ,u could build your own rigg from wood or tubes to save some money here is a link inside sim racing there u can find everything about it even for used riggs and wheels & pedals and blueprints for a home made rigg by your choice http://www.insidesimracing.tv/ head to the forum .

simrig :http://insidesimracing.tv/forums/forum/93-simulation-racing-rigs-cockpits/

and here u can see a home made one for under 50 $http://www.insidesimracing.tv/sim-racing-chassis/sim-rig-creativity-build-cockpit-50/

or a tube one http://www.insidesimracing.tv/reviews/review-of-the-diy-pvc-sim-racing-rig/

but there are manny more ofcourse to choose from .

The seat is the most expensive part of a rig, searching a good 2nd hand one. Also thinking to stay with my G27, or maybe a csr from fanatec.

U can get a seat from the scrapyard (autosloop) verry cheap , go and check that out, i would prefer a nice mercedes one for the long runs :) . 

http://www.tweedehands.nl/auto-onderdelen-accessoires/autoaccessoires/stoelen/sportstoelen-as-t-eco-rood-97775319.html
50 euro ask for the sliders (slede)

or check this out alot of seats http://www.autosloop.com/Onderdelen.aspx