2nd printer, DIY project – which concept should i choose?

so, i’ve some 3d printing experience under my belt and i’d like to start building a printer from scratch. budget is around 500-600€, it should allow for fast print speeds with a decent quality output (80mm/s+). build volume of 200x200x180mm is ok for me. materials i’ll print are PETG and PLA.for my wanhao i3 i have a ikea stuva enclosure which i really like. if possible, i’d like to build another one for the new printer.would a corexy build fit my criterias? which would you recommend for my needs? http://ift.tt/2cGS6cn