Thanks to lots of inspiration from this great site, I decided to take the plunge and build a Bubble Bobble themed bartop arcade.
I'm not going to breakdown the full step by step process as there are loads of great threads on here that cover that so I will just share some of the key facts and tips I found helpful. 
I have loved building this project and hope you like the outcome..
Very happy to answer any questions or discuss any details 

Here's a breakdown of all the costs and parts I used:
£50 -  Bartop - Pre-Cut Kit
£22 - MSI 2.8GHz Pentium 4 PC
 - 3 x Blue Fans
 - Blue Backlight
£20 - Asus Monitor
£8 - Powered Speakers
£42 - IPAC2 & Wiring Kit
£32 - 2 x Sanwa JLW-TM-8 Ball Top  Joysticks
£20 - 14 x Gold Leaf Buttons
£3 - 3 x LED Buttons
£3 - 1P & 2P Start Buttons
£3 - Extension Lead
£5 - Right Angle USB & Jack Connectors
£10 - Various wires, fixing blocks, wire clips, crimp connectors. PCB feet etc.
£10 - Wood Primer & Sandpaper
£20 - Car Paint & Lacquer
£75 - Vinyl Artwork & Marquee
£10 - Perspex Screen
£10- 12mm Chrome Trim
= £343 Total Project Costs