Odd, i was under the iBook G3's were the most reliable iBooks.
Gosh, where did you hear that? While my own iBook has been a warrior, they have been notorious for logic board failures. As far as I know, the G4 iBooks are better, but I think even some of those were prone to logic board problems.
I have four "newer" Macs in the family.
A Mac mini just over a year old
A 450 MHz G4 about seven years old (yes, I call this newer)
A 1.25 MHz G4 about 3 years old
A 700 MHz eMac about 4 years old
Haven't had any problems with any of them.
In fact, all of them except the 450 MHz G4 get zero maintenance; the 450 MHz G4 gets a little bit - preferences. MS Outlook, but it's also the one that is used the most by far.
So I can't really say the Mini is the most reliable - it's actually the only Mac where the DVI port does not work with my LCD monitors, but that is a design issue not a reliability issue.
I should go on record and say that both my 6.5 year old Sawtooth G4 Powermac as well as my Rev. A Mini have given me no problems. The Sawtooth, however, has been upgraded, significantly, with only the power supply and the motherboard still being original.
I will now go and touch a cord of wood.
__________________ 32GB iPad 1 WiFi. 2011 Mac Mini Server (used as a workstation) 2GHz quad-core i7/8GB/1TB, 24" BenQ LCD, 17" NEC LCD, Magic Trackpad. MacBook 2.4GHz Core2 Duo/2GB/200GB/DL-DVDRW. Apple TV 2, 32" flat panel TV, Logitech DiNovo Edge BT keyboard & trackpad. >5TB of FW drives, 16GB iPhone 4S. In memoriam: my Sawtooth "Frankenmac" with upgraded dual 1.3GHz G4/2GB/360GB striped RAID/DVDRW/ATI Radeon 9000 Pro