"Scott Skinner's lament for Dr. MacDonald" - unsurpassed - unfortunately usually played faster these days, but sounds great slowly. Some great recent fiddle airs from Scotland (mostly in the Nineties Collection songbook{Canongate}/CDs{Greentrax})--- Craig an Righ (Ian Hardie), Marnie Swanson of the Grey Coast (Andy Thorburn), Mr. and Mrs MacLean of Snaigow (Dougie MacLean). Also Leaving Stoer (Ivan Drever - on Duncan Chisholm's Redpoint CD), Sgt. Early's Dream and innumerable Neil Gow tunes.
GOW's "Repository of the Dance Music of Scotland" (3 volumes) has recently been republished, by Llanerch - also try to find Pete Clerk's CD of Gow tunes, performed on Neil's fiddle, taken from it's glass case in Blair Castle; I'm still trying to find a copy myself. Each time I see Pete, either I've no money, or he's got no CDs. Try www.dunkeld.co.uk/main for a possible source at Dougie's record shop.
Rob