Before deciding on any piece of equipment, irrespective of what you can afford or want, decide on exactly what it is you want to achieve with the machine (and software) before you buy! There is nothing worse than having the most beautiful design in your head, and not being able to see it come off your CNC... Aspire 4.5 has definitely been able to give me the results I've wanted, just make sure your CNC can deliver! I have a 4 axis machine purpose built for me in Jinan, China ( the CNC capital by the way!). I personally took a flight to Jinan to visit various manufacturers and decided on a specific company to supply our needs. It rings true that what you pay is what you get, but I have not been short changed by buying from the Chinese. They are in fact very helpful. Just make sure to use a reputable agent as a go between (get references), and you'll be OK! Value for money is huge over there when dealing with the right guys/gals. I can afford to buy 3 CNC's for the price of one European or USA made machine. Brand names don't always mean that much, especially if it is for educational use.
Good luck with your purchase!