I wish board manufacturers would use SFP+ slots for 10GbE rather than RJ45. RJ45 ports are expensive, at least let me use a DAC or a fibre SFP+, given that those are way cheaper. This forces me to spend £85 or so on an RJ45 SFP+ module and fuss around with horrible thick cables, at least if it was SFP+ on the board you'd only have to pay that extra cost if you want it.