Like waltair correctly pointed out, "aviation degrees" generally do not give you any real benefit in the long run.
People who are license holders with high school diplomas have an equal chance of securing employment and rising within the company. The company I worked for had a DFO who had a pure business administration degree (plus some banking experience in North America) coupled with his flying experience at Air Canada, Qatar and a local carrier. I myself hold an engineering degree which I completed before I started flying. It may not help me secure employment in case I lose my license in the future but as far as local airlines are concerned, an engineering degree holds "weight" - if you know what I mean. Simply put, they consider it to be a serious degree that requires dedication and hard work, thus both hard work and dedication automatically being added to my "personal strengths".
I'd vote for a 4 year technical degree.