noone1:

Or maybe even just get a sweet wagon of some sort. Small SUVs make little sense to me. What's the point of having more room, but still not enough?

The Macan can hold a lot more than 2 suitcases. The boot is hardly any smaller than the one in the Q5. I've driven the Macan and owned an SQ5. Macan's boot is more than big enough for this type of vehicle, just like the space in the back seats. 
 
GLA is an A-class. Which is nothing more than a Golf-like hatchback. No comparison to a Macan!
 
if you need more luggage space, get a wagon indeed. Totally agree with you. A wagon is better in everything, compared to a SUV, except if you want to do off-roading, which no one really does with their SUVs. A wagon is more comfortable, more fuel economic, faster, better handling, look a lot better..... SUVs don't make sense anymore. At least not to me....
The A6 Avant is the best daily driver I can imagine (except that the upcoming A4 Avant would have been even nicer, because it's smaller).

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Suzy

2013 Porsche Boxster S (MT) | Basalt black metallic
2014 Audi A6 Avant 3.0 BiTDI Quattro | Moonshine blue metallic