I live in the Netherlands and currently the cheapest you can get the GX300 for is is €64,60 so I did a search on decent cases that you can buy for €35 to €70 euros:
Bitfenix:
- Shadow (€ 62,80)
- Merc Alpha (€ 44,89)
- Outlaw USB3 (€ 46,-)
- Shinobi (€ 58,80)
Cooler Master:
- K380 (€ 39,70)
- N300 (€ 44,80)
- N400 (€ 41,90)
Corsair:
- 200R (€ 54,90)
- 300R (€ 69,80)
- Spec 01 (€ 48,90)
- Spec 02 (€ 54,75)
- Spec 03 (€ 57,50)
- 230T (€ 64,90)
Fractal Design:
- Core 2500 (€ 53,03)
- Core 3300 (€ 54,90)
- Core 3500 (€ 67,40)
NZXT:
- Source 340 (€62,95)
- H230 (€ 69,80)
Silverstone:
- Redline 04 (€ 47,99)
Zalman:
- Z11 Plus (€ 54,-)
That's quite the list of competetive cases with similar features, some costing as low as <€45 and the similarly priced cases offer more features, such as radiator support or sound dampening materials.
Heck, the S340 is even €2 cheaper than that ugly (in my opinion, at least) Antec case. Why would you consider the latter? Unless you're into tacky 'Gamerz h4rdware' of course