Hello. I'm considering the purchase of a single-engine aircraft and I know this may sound like blasphemy, but I'd rather stay with steam gauges for a while (mostly because of cost). My concern is that I know if steam gauges die in an approach, it's not a nice thing to have happen. I also know that it's not allowable to fly an IFR/RNAV approach with portable GPS. However, what is a recommended portable GPS device that can be used in an emergency and provide guidance down to the ground? I do understand that these devices are not approved but I would like to have something in the flight bag that can be used in a pinch. Thanks.