That's what I would suggest. Roland Integra plus one of the Roland master keyboards, e.g. the A800pro, which has 61 keys and only weighs 4.5kg (9-10 pounds). With the Roland Integra you get a choice of 6,000 sounds; not all of them are up to date, but a large part is absolutely premium, especially the SuperNatural acoustic sounds (>250) and about 2,000 sounds from the integrated SRX expansions.